#region Using Directives and Copyright Notice

// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above copyright
//       notice, this list of conditions and the following disclaimer in the
//       documentation and/or other materials provided with the distribution.
//     * Neither the name of the Computer Consultancy Pty Ltd nor the
//       names of its contributors may be used to endorse or promote products
//       derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL COMPUTER CONSULTANCY PTY LTD BE LIABLE 
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
// DAMAGE.

using System;
using System.Collections.Generic;
using System.Text;

#endregion

namespace Interlace.ReactorCore
{
    public class RepeatingTimerHandle
    {
        TimerQueue _queue;
        TimeSpan _interval;
        TimerCallback _callback;
        object _state;
        bool _running;

        TimerHandle _currentHandle;

        public RepeatingTimerHandle(TimerQueue queue, TimeSpan interval, TimerCallback callback, object state, bool started)
        {
            _queue = queue;
            _interval = interval;
            _callback = callback;
            _state = state;

            if (started) Start();
        }

        public void Start()
        {
            if (_running) return;

            _currentHandle = _queue.Add(DateTime.Now + _interval, Callback, null);

            _running = true;
        }

        void Callback(DateTime fireAt, object state)
        {
            if (!_running) return;

            _callback(fireAt, _state);

            _currentHandle = _queue.Add(DateTime.Now + _interval, Callback, null);
        }

        public void Stop()
        {
            if (!_running) return;

            _running = false;

            if (_currentHandle != null) _currentHandle.Cancel();

            _currentHandle = null;
        }
    }
}
